UFCThe Ultimate Fighting Championship (UFC) is a U.S.-based mixed martial arts organization, recognized as the largest MMA promotion in the world. The UFC is headquartered in Las Vegas, Nevada and is owned and operated by Zuffa, LLC. This promotion is responsible for solidifying the sport's postion in the history-books.
UFC is currently undergoing a remarkable surge in popularity, along with greater mainstream media coverage. UFC programming can now be seen on FOX, FX, and FUEL TV in the United States, as well as in 35 other countries worldwide.

According to multiple sources close to the fight, MacDonald suffered an undisclosed injury in training recently, which has forced the young Canadian fighter to withdraw from his fight against Condit at UFC 158.
No opponent has been signed to replace MacDonald against Condit next month. As of now, he is still expected to compete on the card.
MacDonald (14-1) most recently defeated B.J. Penn via unanimous decision at UFC on FOX 5 in December. He has won his last four fights in a row since losing his first MMA fight to Condit at UFC 115 in June 2010.
Condit (28-6) lost a UFC welterweight title unification bout to Georges St-Pierre at UFC 154 in November. The loss snapped his five-fight winning streak.

UFC 158, headlined by Georges St-Pierre vs. Nick Diaz, will take place March 16 at Bell Centre in Montreal.

Damn this super blows, I love Condit. I was looking forward to this just as much, if not more than GSP/Diaz. I'd rather Hendricks/Ellenberger stay as-is (with Hendricks getting a title shot with a win). How about Condit vs. Maia? Although it is pretty short notice so I feel like it's never someone that good.